There is a difference whether you and/or your team stands with the Closed Foot Method or Traditional Method and not just visually.
There are two ways of standing at Attention for the American military, drill teams and honor guards when referring to the position of the feet (the star is the center of balance):
Which position is better?
The Closed-Foot Method creates a clean line and helps the honor guard member to balance all of their weight on the whole of both feet and bring the center of balance (the star) centered between the feet.
The Traditional Method, places more pressure on the heels and up through the spine. Subsequently, standing for longer periods can become quite difficult/painful.
When I teach, I show the difference between the two stances to each trainee from the side: stand using the Traditional Method and then, without moving your upper body, move to the Closed-Foot Method. As your center of gravity moves forward, those observing will see your upper body shift forward about two inches! Much more comfortable than an aching spine.